Intumescent body

ABSTRACT

The invention relates to an intumescent body, made from a non-intumescent polymer material providing the form of the body and a coating material applied to the polymer material. According to the invention, the polymer material together with the coating material provides an intumescent system in which the polymer material forms a carbon-donor material.

The invention relates to an intumescent body as defined by the preambleof claim 1 as well as a use as defined in claim 17.

The invention generally relates to the area of flame retarding,intumescent materials or masses. Flame retarding, intumescent massesare, among others, synthetic resins provided with a foaming agent and aflame retarding agent or aqueous synthetic resin dispersions whichcreate a carbon foam when heat is applied. The synthetic resin isprimarily used as carbon donor. The carbon foam has a 10 to 100-foldvolume in comparison to the original thickness of the coating mass. Dueto its very low heat conducting capacity, the foam protects a materialwhich is coated with it from the effects of flames.

DE 197 51 434 A1 describes an intumescent body of this type. The body ismade from a non-intumescent polymer material providing the form of thebody, a synthetic material for example, and an intumescent coating massapplied to the polymer material. Due to its lack of sufficienttransparency, the known coating mass is not particularly suitable forthe coating of printed textiles.

From DE 38 01 465 A1 a method is known for the making of polyurethanemasses equipped with flame retardant. Halogen and/or heavy metalcompounds are not added since these generate gases during a fire whichare injurious to health.

DE 40 41 470 A1 describes an intumescent textile for which a layer of agrainy intumescent agent is provided between two textile areas which areconnected together.

From DE 43 43 668 A1, an intumescent, flame retarding coating mass isknown to which is added, among others, ammonium polyphosphate as flameretarding agent. Furthermore, the coating mass contains melamine as thefoaming agent. Due to its lack of transparency, the known coating massis not suitable for coating printed textiles.

DE 196 08 612 C2 discloses a flame retarding, intumescent coating masswhich contains epoxy resin as synthetic resin. The coating mass containssolvents; up to 65 weight % can be added as fillers. This coating massis also not suitable for coating textiles.

To ensure sufficient effectiveness, intumescent coating masses must beapplied in a sufficiently thick layer to the body to be protected. Thisincreases the weight of the body. Such an increase in weight isundesirable particularly for bodies used in the aviation industry or fortextiles. Regardless of this, the manufacturing of conventional,intumescent coating masses requires the provision and processing of aplurality of different components. This increases manufacturing expensewhich is undesirable. Finally, conventional, intumescent coating masseshave none or only slight transparency. This places significantrestrictions on the surface design of bodies to be coated withintumescent masses.

The object of the invention is to remove the disadvantages according tothe state of technology. In particular an intumescent system is to bespecified which has as low a weight as possible and furthermore issimple and inexpensive to make. In addition, a coating mass of theintumescent system is to have as high a degree of transparency aspossible so that for example an imprint provided on a surface of thebody is not adversely affected.

This object is solved by the features of claims 1 and 17. Usefulembodiments result from the features of claims 2 to 16 and 18 to 34.

According to the invention, it is provided that, together with thecoating mass, the polymer material provides an intumescent system withwhich the polymer material generates a carbon-donor component.—Contraryto the state of technology, the components of the intumescent system areno longer exclusively contained in a substance or a mass withintumescent properties. An essential share of the carbon necessary forthe flame retarding effect according to the intumescence principle isprovided by the polymer material coated with the coating mass. Due tothis, the separate addition of a carbon-donor component to the coatingmass is not necessary. Such a coating mass without carbon-donorcomponent can be made with excellent transparency. To achieve anintumescent effect, the coating mass must only be applied with a thinlayer. The polymer material coated with the coating mass is particularlylight in weight. It is particularly suitable for the manufacturing oftextiles, components for automotive vehicles, aircraft, ships, etc.

According to an advantageous embodiment, the polymer material has acarbon content of ≧20 weight %. Such polymer materials are particularlysuitable as part of the intumescent system. The polymer material canprovide a share of at least 20 weight % of the carbon in the intumescentsystem. However, it is useful that the polymer material provides ahigher share of carbon, preferably at least 30 weight % and particularlypreferably at least 40 weight %. The coating mass also contains carbonand is also to this extent a carbon donor. However, an essential shareof carbon in the intumescent system is provided by the polymer material.The amount of carbon provided by the polymer material can be determinedby examining a foam which was created after flame treatment to determineits carbon content. When the amount of carbon provided by the coatingmass is deducted from the determined carbon content, the amount ofcarbon supplied by the polymer material is obtained.

It has been shown that in particular such polymer materials are suitableas part of the intumescent system provided by the invention which have adifference ΔT between a melting point temperature T_(s) and acrystallization temperature T_(C) of the polymer material ≧40 K.According to an embodiment, the difference ΔT is in the range of 40 to80 K, preferably in the range of 45 to 75 K, particularly preferably inthe range of 50 or 55 to 70 K. The crystallization temperature T_(c) isusefully ≦200° C., preferably ≦190° C. Further, it has been shown to beuseful to select the polymer material so that the melting temperatureT_(c) is in the range of 50° C. to 400° C. or a decompositiontemperature in the range of 100° C. to 500° C. It has been shown thatpolymer materials with the aforementioned physical properties areparticularly well suited as carbon-donor components in the intumescentsystem as provided by the invention. It has been observed, particularlywith such polymer materials, that the coating mass penetrates theinterior of the polymer material during a fire and flame-extinguishingfoam is created with the aid of the polymer material. Experiments haveshown that polymer materials, which have a difference ΔT ofsignificantly less than 40 K between their melting temperature T_(s) andtheir crystallization temperature T_(C), are less suitable as componentsfor the intumescent system.—The polymer material can be selected fromthe following group: polyester, polyamide, polyacrylat, polyurethane,polyacrylnitril, aramids and derivatives of the aforementioned polymers.

In accordance with a further embodiment, the intumescent system is ahalogen-free and/or heavy metal-free system. Such a system does notdevelop gases during a fire which are particularly injurious to health.

Conventional coating masses can always be used as coating mass, wherein,however, the separate addition of a carbon-donor component can beomitted. The coating mass advantageously contains a flame retardingagent. A coating mass with the following composition has been shown tobe particularly suitable for the intumescent system provided by theinvention:

-   25 to 95 weight. % of an aqueous dispersion containing polyurethane    or polyacrylat,-   0.5 to 10 weight % of an isocyanate or a melamine-formaldehyde and-   3 to 15 volume % of a flame retarding agent.

In the hardened state, the suggested coating mass has an excellenttransparency. The coating mass is particularly suitable to thewaterproofing or coating of textiles made of synthetic organic fibers.The optical appearance of the textile or an imprint on same is in no wayadversely affected by the coating mass provided by the invention. On thecontrary, an excellent brilliance is created which allows the color ofthe textile or an imprint on same to appear even more attractive.

The synthetic organic fibers which make up the textile serve in thiscase as carbon donors in the intumescent system. Contrary to the stateof technology, a component providing the carbon donor in the coatingmass can be omitted. According to this invention, the coating mass isformed so that it generates an intumescent textile in combination withsynthetic organic fibers. In comparison to the state of technology, thisdrastically reduces the grams per square meter weight of the textile.Together with the synthetic organic fibers, the coating mass has anexcellent flame retarding effect. It is particularly suitable forcoating textiles such as curtains, tarpaulins, sunshades, tents,awnings, pieces of clothing and similar.

The generation of a flame retarding carbon foam is particularly due tothe addition of the isocyanate or melamine-formaldehyde acting as thecross-linking agent. When thermoplastic organic fibers are used, furthercross-linking is achieved when the fibers are softened under the effectsof the heat. According to the current state of knowledge, this makes anessential contribution to the generation of a stable carbon foam.

According to an advantageous embodiment, the flame retarding agent is anacid donor, in particular an ammonium polyphosphate. In addition, 0.1 to1.0 weight % of an agent can be contained for deaerating. This canfurther improve the transparency of the coating created by the coatingmass.

In addition, 0.1 to 1.5 weight % of an insecticide and/or a bactericidecan also be included. This increases the life of the textile.

The polymer material can be in the form of fibers or woven cloth orknitted fabric made thereof. Apart from this, other bodies which createa form from the polymer material can also be made. This can be, forexample, the interior coverings inside of motor vehicles, aircraft orships, the housing of electronic or electro-technical devices, thecomponents from building construction, for example, ventilation tubes,window frames, cable ducts or similar, components of furniture, etc.

In further accordance to the invention, a non-intumescent polymermaterial which provides the form of a body is used as carbon-donorcomponent of an intumescent system. The phrase “a polymer material whichprovides the form of a body” is used to mean a polymer material which ispresent in solid form and is suitable for use as a substrate for thecoating with a coating mass. The polymer material can be fibers, wovencloth, knitted fabric or parts.

According to an advantageous embodiment, further components of theintumescent system can be contained in a coating mass applied to thepolymer material. The intumescent system suggested by the invention thusconsists of at least two different substances of which one is thepolymer material and the other is the coating mass.

Due to the advantageous embodiment of the use, reference is made to theaforementioned features which also apply accordingly to the use.

Examples will now be used to describe the invention in more detail basedon the drawings. The figures are listed below:

FIG. 1 a thermal analysis of the heating up of a blue textile,

FIG. 2 a thermal analysis of the cooling off of the blue textile,

FIG. 3 a thermal analysis of the heating up of a green textile and

FIG. 4 a thermal analysis of the cooling off of the green textile.

The results shown in FIG. 1 to 4 are the results of a dynamic thermalanalysis according to the procedure of “Differential ScanningCalorimetry” (DSC). The thermal analyses were performed using thefollowing temperature program: Rate of heat up:  10° C./min Startingtemperature:  25° C. Maximum temperature: 300° C. Holding time atmaximum temperature: 3 min

The green textile weighed 5.41 mg. The blue textile weighed 4.5 mg. Boththe blue and the green textile are textiles which were made frompolyester fibers. The polyester fibers were not been coated with acoating mass. The examined polyester fibers are polyester fibers with adifferent composition.

FIG. 1 shows that the polyester fiber labeled as blue textile has amelting temperature T_(s) of approximately 257° C. As FIG. 2 shows, thecrystallization temperature T_(c) is approximately 215° C. A differenceΔT between the melting temperature T_(s) and the crystallizationtemperature T_(c) is in this case approximately 42° C.

As shown in FIGS. 3 and 4, the polymer material labeled as green textilehas a melting temperature T_(S) of 254° C. and a crystallizationtemperature of only 187° C. Here the difference ΔT between the meltingtemperature T_(S) and the crystallization temperature T_(C) is 67° C.

During further experiments, the polymer materials labeled as green andblue textile were coated with coating masses of the followingcompositions: Coating mass A (= basic mass) Chemical Weight in gComposition Brand Name Supplier Purpose 80 Polyurethane Impranil BayerAG Binding DLS agent 20 Water 0.5 Polysiloxane Agitan 256 MünzingDefoaming Chemie GmbH agent 1.5 Polyurethane Tafigel Münzing ThickenerPUR 61 Chemie GmbH

The aforementioned mass forms a basic mass which is used to produceintumescent coating masses. Additional components can be added to thebasic mass, for example fungicides and similar. 1 g Chinone AF of thecompany Bode Chemie Hamburg can be added, for example, as fungicide tothe basic mass. Coating mass B Chemical Weight in g Composition BrandName Supplier Purpose 100 Basic mass 6 Ammonium Exolit AP Clariant Aciddonor polyphosphate 462 Chemie

Coating mass C Chemical Weight in g Composition Brand Name SupplierPurpose 100 Basic mass 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 2 Isocyanate Desmodur DA Bayer AG Cross-linking agent

Coating mass D Weight Chemical in g Composition Brand Name SupplierPurpose 100 Basic mass 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 15 Melamine CSC Jäckle Foaming Chemie GmbHagent 2 Isocyanate Desmodur DA Bayer AG Cross- linking agent

Coating mass E Weight Chemical in g Composition Brand Name SupplierPurpose 100 Basic mass 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 15 Melamine CSC Jäckle Foaming Chemie GmbHagent 2 Isocyanate Desmodur Bayer AG Cross- DA linking agent 20Pentaerythrite CSC Jäckle Carbon donor Chemie GmbH

Coating masses A to E were applied to both the blue and the greentextile in an amount of 85 g/m², namely using an air knife at a speed of8 m/min. For drying and fixation, the textile covered with the coatingmass was treated thermally as follows:

-   Heating up to 100° C., holding time of 2 min,-   Heating up to 130° C., holding time of 1 min,-   Heating up to 150° C., holding time of 1 min.

The thus coated polymer materials were then subjected to a flame test inaccordance with the standard DIN 4102-B2 which is valid in Germany. Thefollowing parameters were used for this: Gas: Propane Exhaust speed: 0.7m/s Flame height: 20 mm Distance textile/flame: 16 mm Flaming time: 15 s

Using coating masses A to E according to the aforementioned tablesduring the flame test according to DIN 4102-B2, the results shown in thefollowing table were obtained for the green textile: Edge Test MaterialLengthwise Edge Test Flame Direction*) (Crosswise Direction*) Recipe no.A B C D E A B C D E Reaches the measuring 15 17 ./. ./. ./. 17 18 ./../. ./. mark 1) Self-extinguishing 42 35 14 12 12 38 33 10 10 12 of theflames, end of the afterburning*)Time specified in seconds starting at beginning of experiment./. No occurrence of the event

It is shown that, already with coating mass C, the green textilefulfills the criteria of the flame test according to the standard DIN4102-B2. The coating mass C contains no addition of a carbon donor. Theresults of the experiment clearly show that, corresponding to theinvention's teaching, in particular a carbon donor in the coating masscan be omitted when a suitable polymer material is used to make theintumescent system.

The following tables list the results which were obtained with the greenand blue textiles coated with coating mass C during the fire protectiontest according to DIN 4102-B1: Experiment Parameter Textile, Blue *)Textile, Green *) Reaches measuring mark 13 ./. 1/edge test, lengthwisedirection Reaches measuring mark 17 ./. 1/edge test, crosswise directionEnd of the afterburning/ 60 14 edge test, lengthwise direction End ofthe afterburning/ 45 10 edge test, crosswise direction*) Time specified in seconds starting at beginning of experiment./. No occurrence of the event

In a further experiment, a further polymer material was examined. Thisis a woven cloth made of polyamide with a grams per square meter weightof 60 g/m².

Under the aforementioned coating conditions, the polyamide woven clothwas coated with the coating masses A1 to E1 described in the followingtables in the amount of 85 g/m². Coating mass A1 (= basic mass 1)Chemical Weight in g Composition Brand Name Supplier Purpose 80Polyurethane Impranil Bayer AG Binding DLF agent 20 Water 0.5Polysiloxane Agitan 256 Münzing Defoaming Chemie GmbH agent 1.5Polyurethane Tafigel Münzing Thickener PUR 61 Chemie GmbH

The aforementioned mass forms a basic mass 1 which is used to makeintumescent coating masses. Additional components can be added to thebasic mass, for example fungicides and similar. 1 g quinone AF of thecompany Bode Chemie Hamburg can be added, for example, as fungicide tothe basic mass. Coating mass B1 Chemical Weight in g Composition BrandName Supplier Purpose 100 Basic mass 6 Ammonium Exolit AP Clariant Aciddonor polyphosphate 462 Chemie

Coating mass C1 Chemical Weight in g Composition Brand Name SupplierPurpose 100 Basic mass 1 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 2 Isocyanate Desmodur DA Bayer AG Cross-linking agent

Coating mass D1 Weight Chemical in g Composition Brand Name SupplierPurpose 100 Basic mass 1 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 15 Melamine CSC Jäckle Foaming Chemie GmbHagent 2 Isocyanate Desmodur DA Bayer AG Cross- linking agent

Coating mass E1 Weight Chemical in g Composition Brand Name SupplierPurpose 100 Basic mass 1 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 15 Melamine CSC Jäckle Foaming Chemie GmbHagent 2 Isocyanate Desmodur Bayer AG Cross- DA linking agent 20Pentaerythrite CSC Jäckle Carbon donor Chemie GmbH

Under the afore-described conditions, the polyamide woven cloth whichwas coated with the coating masses A1 to E1 was subjected to a flametest according to DIN 4102-B2. During this test, the results shown inthe following table were obtained: Edge Test Material Lengthwise EdgeTest Flame Direction*) (Crosswise Direction*) Recipe no. A1 B1 C1 D1 E1A1 B1 C1 D1 E1 Reaches the measuring 12 15 ./. ./. ./. 17 18 ./. ./. ./.mark 1) Self-extinguishing 33 37 12 10 10 38 33 8 12 10 of the flames,end of the afterburning*)Time specified in seconds starting at beginning of experiment./. No occurrence of the event

The results clearly show that polyamide is also suitable as polymermaterial to make the intumescent system provided by the invention. Alsowhen polyamide is used, it is sufficient to coat the polymer materialwith the coating mass C1 to obtain a sufficient intumescent effect. Inparticular, an addition of foaming agent and carbon-donor in the coatingmass can be omitted.

In a further experiment, a woven cloth made of polyacrylatsuper-absorber fiber “Oasis type 102” with a grams per square meterweight of 90 g/m² was used as the polymer material. This woven cloth wascoated under the aforementioned conditions with coating masses A2 to E2described in the following tables in an amount of 65 g/m²: Coating massA2 (= basic mass 2) Chemical Weight in g Composition Brand Name SupplierPurpose 100 Polyurethane Impranil Bayer AG Binding ELH agent

The aforementioned mass forms a basic mass 2 which is used to makeintumescent coating masses. Additional components, such as fungicide andsimilar, can be added to the basic mass 2. Coating mass B2 ChemicalWeight in g Composition Brand Name Supplier Purpose 100 Basic mass 2 6Ammonium Exolit AP Clariant Acid donor polyphosphate 462 Chemie

Coating mass C2 Chemical Weight in g Composition Brand Name SupplierPurpose 100 Basic mass 2 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 2 Isocyanate Additive Z Bayer AG Cross- linkingagent

Coating mass D2 Weight Chemical in g Composition Brand Name SupplierPurpose 100 Basic mass 2 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 15 Melamine CSC Jäckle Foaming Chemie GmbHagent 2 Isocyanate Additive Z Bayer AG Cross- linking agent

Coating mass E2 Weight Chemical in g Composition Brand Name SupplierPurpose 100 Basic mass 2 6 Ammonium Exolit AP Clariant Acid donorpolyphosphate 462 Chemie 15 Melamine CSC Jäckle Foaming Chemie GmbHagent 2 Isocyanate Additive Z Bayer AG Cross- linking agent 20Pentaerythrite CSC Jäckle Carbon donor Chemie GmbH

The samples made from polyacrylat super-absorber fiber “Oasis type 102”covered with the coating masses A2 to E2 were in turn subjected to theflame test according to DIN 4102-B2. The results obtained thereof arelisted in the following table: Edge Test Material Lengthwise Edge TestFlame Direction*) (Crosswise Direction*) Recipe no. A2 B2 C2 D2 E2 A2 B2C2 D2 E2 Reaches the measuring 17 16 ./. ./. ./. 16 16 ./. ./. ./.mark 1) Self-extinguishing 44 39 6 7 6 35 34 8 7 7 of the flames, end ofthe afterburning*)Time specified in seconds starting at beginning of experiment./. No occurrence of the event

The results show that polyacrylat super-absorber fiber “Oasis type 102”is also a suitable polymer material which can be combined into aintumescent system with a simply composed coating mass C2. Also whenthis polymer material is used, it is not necessary to add a carbon-donorto the coating mass.

The coating masses C, C1, and C2 have excellent transparency. An imprintapplied to the textile appears brilliant and is visible without anyadverse effects. This even applies to an imprint which is visible onboth sides of the textile. The textile has a grams per square meterweight of less than 300 g/m². When heat or flames are applied, thematerial foams and creates a carbon foam which suppresses further flamedevelopment.

Since the suggested intumescent textile uses the material which providesthe textile itself as carbon donor for the making of a carbon foam whenflames are applied, a significant reduction of the grams per squaremeter weight can be achieved. The intumescent features are neverthelessexcellent.

1. Intumescent body made of a non-intumescent polymer mate-rialproviding the form of the body and a coating mass applied to the polymermaterial, wherein together with the coating mass, the polymer materialresults in an intumescent system in which the polymer material forms acarbon-donor component.
 2. Intumescent body as defined in claim 1,wherein the polymer material has a carbon content of ≧20 weight %. 3.Intumescent body as defined in claim 1, wherein the polymer materialprovides a share of at least 20 weight % of the carbon in theintumescent system.
 4. Intumescent body as defined in claim 1, wherein adifference ΔT between a melting temperature T_(S) and a crystallizationtemperature T_(C) of the polymer material is ≧40 K.
 5. Intumescent bodyas defined in claim 1, wherein a difference ΔT is in the range of 40 to80 K, preferably in the range of 45 to 75 K, particularly preferably inthe range of 55 to 70 K.
 6. Intumescent body as defined in claim 1,wherein the crystallization temperature T_(C) is ≦200° C., preferably≦190° C.
 7. Intumescent body as defined in claim 1, wherein the polymermaterial has a melting temperature Ts in the range of 50° C. to 400° C.or a decomposition temperature in the range of 150° C. to 500° C. 8.Intumescent body as defined in claim 1, wherein the intumescent systemis a halogen-free and/or heavy metal-free system.
 9. Intumescent body asdefined in claim 1, wherein the polymer material is selected from thefollowing group: polyester, polyamide, polyacrylat, polyure-thane,polyacrylnitril, aramids and derivatives of the afore-mentionedpolymers.
 10. Intumescent body as defined in claim 1, wherein thecoating mass contains a flame retarding agent.
 11. Intumescent body asdefined in claim 1, wherein the coating mass has the followingcomposition: 25 to 95 weight % of an aqueous dispersion containingpoly-urethane or polyacrylat, 0.5 to 10 weight % of an isocyanate or amelamine-formaldehyde and 3 to 15 weight % of the flame retarding agent.12. Intumescent body as defined in claim 1, wherein the flame retardingagent is an acid donor.
 13. Intumescent body as defined in claim 1,wherein the acid donor is ammonium polyphosphate.
 14. Intumescent bodyas defined in claim 1, wherein, in addition, 0.1 to 1.0 weight % of anagent for deaeration are included.
 15. Intumescent body as defined inclaim 1, wherein, in addition, 0.1 to 1.5 weight % of an insecticideand/or a bactericidin are included.
 16. Intumescent body as defined inclaim 1, wherein the polymer material is present in the form of fibersor woven cloth, knitted fabric made thereof.
 17. Use of anon-intumescent polymer material providing the form of a body ascarbon-donor component of an intumescent system.
 18. Use as defined inclaim 17, wherein further components of the intumescent system arecontained in a coating mass applied to the polymer material.
 19. Use asdefined in claim 17, wherein the polymer material has a carbon contentof ≧20 weight %.
 20. Use as defined in claim 17, wherein the polymermaterial provides a share of at least 20 weight % of the carbon in theintumescent system.
 21. Use as defined in claim 17, wherein a differenceΔT between a melting temperature T_(S) and a crystallization temperatureT_(C) is greater than 40 K.
 22. Use as defined in claim 17, wherein thedifference ΔT is in the range of 40 to 80 K, preferably in the range of45 to 75 K, particularly preferably in the range of 55 to 70 K.
 23. Useas defined in claim 17, wherein the crystallization temperature T_(C) is≦200° C., preferably ≦190° C.
 24. Use as defined in claim 17, whereinthe intumescent system is a halogen-free and/or heavy metal-free system.25. Use as defined in claim 17, wherein the polymer material is selectedfrom the following group: polyester, polyamide, polyacrylat,polyurethane, polyacrylni-tril, aramids and derivatives of theaforementioned polymers.
 26. Use as defined in claim 17, wherein theintumescent system is a system causing a chemical or physicalintumescence.
 27. Use as defined in claim 17, wherein the coating masscontains a flame retarding agent.
 28. Use as defined in claim 17,wherein the polymer material has a melting temperature T_(S) in therange of 50° C. to 400° C. or a decomposition temperature in the rangeof 150° C. to 500° C.
 29. Use as defined in claim 17, wherein thecoating mass has the following composition: 25 to 95 weight % of anaqueous dispersion containing poly-urethane or polyacrylat, 0.5 to 10weight % of an isocyanate or a melamine-formaldehyde and 3 to 15 weight% of the flame retarding agent.
 30. Use as defined in claim 17, whereinthe flame retarding agent is an acid donor.
 31. Use as defined in claim17, wherein the acid donor is ammonium polyphosphate.
 32. Use as definedin claim 17, wherein, in addition, 0.1 to 1.0 weight % of an agent fordeaeration are included.
 33. Use as defined in claim 17, wherein, inaddition, 0.1 to 1.5 weight % of an insecticide and/or a bactericidinare included.
 34. Use as defined in claim 17, wherein the polymermaterial is present in the form of fibers or woven cloth, knitted fabricmade thereof.